21921186100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{280681}}^1$

素因数の和:280777

約数の個数: 72

約数和(自身を含む): 52624506816

約数和(自身を除く): 30703320716

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 71, 100, 110, 142, 220, 275, 284, 355, 550, 710, 781, 1100, 1420, 1562, 1775, 3124, 3550, 3905, 7100, 7810, 15620, 19525, 39050, 78100, 280681, 561362, 1122724, 1403405, 2806810, 3087491, 5613620, 6174982, 7017025, 12349964, 14034050, 15437455, 19928351, 28068100, 30874910, 39856702, 61749820, 77187275, 79713404, 99641755, 154374550, 199283510, 219211861, 308749100, 398567020, 438423722, 498208775, 876847444, 996417550, 1096059305, 1992835100, 2192118610, 4384237220, 5480296525, 10960593050, 21921186100]

約数ペア:

[(1, 21921186100), (2, 10960593050), (4, 5480296525), (5, 4384237220), (10, 2192118610), (11, 1992835100), (20, 1096059305), (22, 996417550), (25, 876847444), (44, 498208775), (50, 438423722), (55, 398567020), (71, 308749100), (100, 219211861), (110, 199283510), (142, 154374550), (220, 99641755), (275, 79713404), (284, 77187275), (355, 61749820), (550, 39856702), (710, 30874910), (781, 28068100), (1100, 19928351), (1420, 15437455), (1562, 14034050), (1775, 12349964), (3124, 7017025), (3550, 6174982), (3905, 5613620), (7100, 3087491), (7810, 2806810), (15620, 1403405), (19525, 1122724), (39050, 561362), (78100, 280681)]